Results 51 to 60 of about 150,397 (174)

Membrane Semi‐Permeability and Ion Selectivity in Chemiosmosis: Open Systems Volume Dependence of Electrolyte Chemistry

open access: yesAdvanced Materials Interfaces, EarlyView.
Very small cellular compartments can break electroneutrality and harness proton gradients without active transport structures, whereas larger volumes cannot, underscoring why life's critical energy processes are confined in microscopic spaces. ABSTRACT The effect of pH changes in external ionic solutions on liposomes entrapping non‐permeable weak acid ...
Josep M. Ribó   +4 more
wiley   +1 more source

Effect of dietary organic and inorganic selenium supplementation on chemical, mineral and fatty acid composition of ostrich meat [PDF]

open access: yes, 2015
This study evaluated the effect of dietary organic and inorganic selenium supplementation on chemical, mineral and fatty acid composition of ostrich meat.
De Smet, Stefaan   +7 more
core   +1 more source

Disrupting J‐Aggregation in Triazatruxene Dimers to Develop Responsive Luminescent Inks for Anti‐Counterfeiting Applications

open access: yesAdvanced Optical Materials, Volume 13, Issue 8, March 13, 2025.
This study investigates the stimulus‐responsive behavior of trialkylated triazatruxene dimers for third‐generation luminescent security inks. In particular, the derivative with flexible dodecyl chains displays high‐contrast, reversible color changes upon heating or shear, driven by liquid crystalline phase transitions and involving J ...
Raúl Martín   +7 more
wiley   +1 more source

SÍNTESIS DE DERIVADOS DE XANTENO EN UN LÍQUIDO IÓNICO

open access: yesAvances en Ciencias e Ingeniería, 2019
This paper describes a simple and efficient procedure for obtaining an ionic liquid, 1,3-dimethylimidazolium methylsulfate, and its application in the synthesis of various xanthene derivatives, by coupling reactions of benzaldehyde or substituted ...
María E. Choque-Zárate   +3 more
doaj  

Synthetic epoxy-pregnan steroids: effects on anxiety behavior in rats [PDF]

open access: yes, 2016
Neurosteroids like 3α-OH-5α-pregnan-20-one (allopregnanolone) and 3α-OH-5β-pregnan-20-one (pregnanolone) modulate the γ-aminobutyric acid-A (GABAA) receptor function and produce several effects that can be considered for therapeutical pruposes like ...
Coirini, Hector   +2 more
core   +1 more source

Kombinierte lösungs‐ und oberflächengestützte Synthese eines vollständig kondensierten, kreuzförmigen Phthalocyanin‐Pentamers

open access: yesAngewandte Chemie, EarlyView.
Ein Phthalocyanin‐(Pc)‐Pentamer wurde durch die Kombination lösung‐ und oberflächengestützter Synthese unter Ultrahochvakuumbedingungen erhalten. Die entstandene Pc‐basierte Nanostruktur weist ein exaktes stöchiometrisches Verhältnis von 4:1 zweier unterschiedlicher Metallionen auf, mit präziser Positionskontrolle.
Luis M. Mateo   +8 more
wiley   +1 more source

Structural and electrical properties of Zr-doped K0.48Na0.52NbO3 ceramics: “Hard” lead-free piezoelectric

open access: yesBoletín de la Sociedad Española de Cerámica y Vidrio, 2023
The structural and electrical properties of K0.48Na0.52Nb1−xZrxO3−δ (x = 0–0.04) ceramics prepared by the conventional solid-state reaction method were studied.
Héctor Beltrán-Mir   +4 more
doaj   +1 more source

MULTI-INSTRUMENTAL IDENTIFICATION OF ORPIMENT IN ARCHAEOLOGICAL MORTUARY CONTEXTS [PDF]

open access: yes, 2014
Indexación: Web of Science; Scielo.This paper reports on an unknown yellowish mineral compound found in an archaeological context from Chorrillos cemetery (Calama, Chile) dating to the Early Formative period (800 - 200 B.C.).
ARRIAZA, BERNARDO   +6 more
core   +1 more source

INFLUENCIA DEL CATALIZADOR DE TRANSFERENCIA DE FASES EN LA SÍNTESIS DE HIDROXIMETILFURFURAL (HMF)

open access: yesAvances en Ciencias e Ingeniería, 2019
Se presenta la síntesis de 5-hidroximetilfurfural (HMF) empleando condiciones de la química verde, el cual se obtiene a través de la reacción de deshidratación de la fructosa empleando un catalizador ácido y un catalizador de transferencia de fase.
Martha Menes-Arzate   +5 more
doaj  

Influence of the cis/trans configuration on the supramolecular aggregation of aryltriazoles

open access: yesBeilstein Journal of Organic Chemistry, 2019
The ability of trans- and cis-1,2-glucopyranosyl and cyclohexyl ditriazoles, synthesized by CuAAC "click" chemistry, to form gels was studied, their physical properties determined, and the self-aggregation behavior investigated by SEM, X-ray, and EDC ...
Sara Tejera   +5 more
doaj   +1 more source

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